14
HOT WATER
OUTLET
TO TANK
INLET
CHECK
VALVE
MIXING
VALVE
COLD
WATER
INLET
TEMPERED WATER
OUTLET
12” TO 15”
(30-38 cm)
CHECK
VALVE
FIGURE 10.
DISHWASHING MACHINES
$OO GLVKZDVKLQJ PDFKLQHV PHHWLQJ WKH 1DWLRQDO 6DQLWDWLRQ
)RXQGDWLRQUHTXLUHPHQWVDUHGHVLJQHGWRRSHUDWHZLWKZDWHU
IORZ SUHVVXUHV EHWZHHQ DQG SRXQGV SHU VTXDUH LQFK
N3D DQG N3D )ORZ SUHVVXUHV DERYH SRXQGV
SHU VTXDUH LQFK N3D RU EHORZ SRXQGV SHU VTXDUH
LQFK N3D ZLOO UHVXOW LQ LPSURSHUO\ VDQLWL]HG GLVKHV
:KHUHSUHVVXUHVDUHKLJKDZDWHUSUHVVXUHUHGXFLQJRUIORZ
UHJXODWLQJFRQWUROYDOYHVKRXOGEHXVHGLQWKH)&
OLQH WR WKH GLVKZDVKLQJ PDFKLQH DQG VKRXOG EH DGMXVWHG WR
GHOLYHUZDWHUSUHVVXUHEHWZHHQWKHVHOLPLWV
7KH 1DWLRQDO 6DQLWDWLRQ )RXQGDWLRQ DOVR UHFRPPHQGV
FLUFXODWLRQ RI ) & ZDWHU 7KH FLUFXODWLRQ IORZ UDWH
VKRXOGEHMXVWHQRXJKWRSURYLGH)&ZDWHUDWWKH
SRLQWRIWDNHRIIWRWKHGLVKZDVKLQJPDFKLQH
$GMXVW IORZ E\ WKURWWOLQJ D IXOO SRUW EDOO YDOYH LQVWDOOHG LQ
WKH FLUFXODWLQJ OLQH RQ WKH RXWOHW VLGH RI WKH SXPS 1HYHU
WKURWWOHIORZRQWKHVXFWLRQVLGHRIDSXPS6HH:DWHU3LSLQJ
'LDJUDPVLQWKLVPDQXDO
CLOSED WATER SYSTEMS
:DWHUVXSSO\V\VWHPVPD\EHFDXVHRIFRGHUHTXLUHPHQWVRU
VXFK FRQGLWLRQV DV KLJK OLQH SUHVVXUH DPRQJ RWKHUV KDYH
LQVWDOOHG GHYLFHV VXFK DV SUHVVXUH UHGXFLQJ YDOYHV FKHFN
YDOYHV DQG EDFN IORZ SUHYHQWHUV 'HYLFHV VXFK DV WKHVH
FDXVHWKHZDWHUV\VWHPWREHDFORVHGV\VWHP
THERMAL EXPANSION
$V ZDWHU LV KHDWHG LW H[SDQGV WKHUPDO H[SDQVLRQ ,Q D
FORVHGV\VWHPWKHYROXPHRIZDWHUZLOOJURZZKHQLWLVKHDWHG
$VWKHYROXPHRIZDWHUJURZVWKHUHZLOOEHDFRUUHVSRQGLQJ
LQFUHDVHLQZDWHUSUHVVXUHGXHWRWKHUPDOH[SDQVLRQ7KHUPDO
H[SDQVLRQFDQFDXVHSUHPDWXUHWDQNIDLOXUHOHDNDJH7KLV
W\SH RI IDLOXUH LV QRW FRYHUHG XQGHU WKH OLPLWHG ZDUUDQW\
7KHUPDOH[SDQVLRQFDQDOVRFDXVHLQWHUPLWWHQW7HPSHUDWXUH
3UHVVXUH5HOLHI9DOYHRSHUDWLRQZDWHUGLVFKDUJHGIURPWKH
YDOYH GXH WR H[FHVVLYH SUHVVXUH EXLOG XS 7KLV FRQGLWLRQ LV
QRW FRYHUHG XQGHU WKH OLPLWHG ZDUUDQW\ 7KH 7HPSHUDWXUH
3UHVVXUH5HOLHI9DOYHLVQRWLQWHQGHGIRUWKHFRQVWDQWUHOLHI
RIWKHUPDOH[SDQVLRQ
$ SURSHUO\ VL]HG WKHUPDO H[SDQVLRQ WDQN PXVW EH LQVWDOOHG RQ
DOO FORVHG V\VWHPV WR FRQWURO WKH KDUPIXO HIIHFWV RI WKHUPDO
H[SDQVLRQ&RQWDFWDORFDOSOXPELQJVHUYLFHWHFKQLFLDQWRKDYHD
WKHUPDOH[SDQVLRQWDQNLQVWDOOHG
6HH:DWHU/LQH&RQQHFWLRQVRQSDJHDQGWKH:DWHU3LSLQJ
'LDJUDPVEHJLQQLQJRQSDJH
TEMPERATURE-PRESSURE RELIEF VALVE
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22-
CSA 4.4 and ASME code.
Properly sized temperature-
pressure relief valve must be
installed in opening provided.
Can result in overheating and
excessive tank pressure.
Can cause serious injury or death.
7KLVZDWHUKHDWHULVSURYLGHGZLWKDSURSHUO\UDWHGVL]HGDQGFHUWL¿HG
FRPELQDWLRQ 7HPSHUDWXUH3UHVVXUH 5HOLHI 9DOYH 7 3 YDOYH E\
WKHPDQXIDFWXUHU7KHYDOYHLVFHUWL¿HGE\DQDWLRQDOO\UHFRJQL]HG
WHVWLQJODERUDWRU\WKDWPDLQWDLQVSHULRGLFLQVSHFWLRQRISURGXFWLRQ
RI OLVWHG HTXLSPHQW RI PDWHULDOV DV PHHWLQJ WKH UHTXLUHPHQWV IRU
3UHVVXUH5HOLHI9DRW:DWHU6XSSO\6\VWHPV$16,=
&6$DQGWKHFRGHUHTXLUHPHQWVRI$60(
,I UHSODFHG WKH QHZ 7 3 YDOYH PXVW PHHW WKH UHTXLUHPHQWV
RI ORFDO FRGHV EXW QRW OHVV WKDQ D FRPELQDWLRQ 7HPSHUDWXUH
3UHVVXUH 5HOLHI 9DOYH UDWHGVL]HG DQG FHUWL¿HG DV LQGLFDWHG LQ
WKH DERYH SDUDJUDSK 7KH QHZ YDOYH PXVW EH PDUNHG ZLWK D
PD[LPXP VHW SUHVVXUH QRW WR H[FHHG WKH PDUNHG K\GURVWDWLF
ZRUNLQJSUHVVXUHRIWKHZDWHUKHDWHUSVL N3DDQG
DGLVFKDUJHFDSDFLW\QRWOHVVWKDQWKHZDWHUKHDWHU%WXKURUN:
LQSXWUDWHDVVKRZQRQWKHZDWHUKHDWHU¶VPRGHOUDWLQJODEHO
127(,QDGGLWLRQWRWKHIDFWRU\LQVWDOOHG7HPSHUDWXUH3UHVVXUH
5HOLHI9DOYHRQWKHZDWHUKHDWHUHDFKUHPRWHVWRUDJHWDQNWKDW
PD\EHLQVWDOOHGDQGSLSHGWRDZDWHUKHDWLQJDSSOLDQFHPXVWDOVR
KDYHLWVRZQSURSHUO\VL]HGUDWHGDQGDSSURYHG7HPSHUDWXUH
3UHVVXUH 5HOLHI 9DOYH LQVWDOOHG &DOO WKH WROO IUHH WHFKQLFDO
VXSSRUWSKRQHQXPEHUOLVWHGRQWKHEDFNFRYHURIWKLVPDQXDO
IRUWHFKQLFDODVVLVWDQFHLQVL]LQJD7HPSHUDWXUH3UHVVXUH5HOLHI
9DOYHIRUUHPRWHVWRUDJHWDQNV
)RUVDIHRSHUDWLRQRIWKHZDWHUKHDWHUWKH7HPSHUDWXUH3UHVVXUH
5HOLHI9DOYHPXVWQRWEHUHPRYHGIURPLWVGHVLJQDWHGRSHQLQJ
QRU SOXJJHG 7KH 7HPSHUDWXUH3UHVVXUH 5HOLHI 9DOYH PXVW EH
LQVWDOOHGGLUHFWO\LQWRWKH¿WWLQJRIWKHZDWHUKHDWHUGHVLJQHGIRU
WKH SUHVVXUH UHOLHI YDOYH ,QVWDOO GLVFKDUJH SLSLQJ VR WKDW DQ\
GLVFKDUJHZLOOH[LWWKHSLSHZLWKLQLQFKHVFPDERYHDQ
DGHTXDWHÀRRUGUDLQRUH[WHUQDOWRWKHEXLOGLQJ,QFROGFOLPDWHV
LW LV UHFRPPHQGHG WKDW LW EH WHUPLQDWHG DW DQ DGHTXDWH GUDLQ
LQVLGHWKHEXLOGLQJ%HFHUWDLQWKDWQRFRQWDFWLVPDGHZLWKDQ\
OLYHHOHFWULFDOSDUW7KHGLVFKDUJHRSHQLQJPXVWQRWEHEORFNHG
RUUHGXFHGLQVL]HXQGHUDQ\FLUFXPVWDQFHV([FHVVLYHOHQJWK
RYHUIHHWPRUXVHRIPRUHWKDQIRXUHOERZVFDQFDXVH
UHVWULFWLRQDQGUHGXFHWKHGLVFKDUJHFDSDFLW\RIWKHYDOYH
Summary of Contents for 650A
Page 23: ...23 FIGURE 19 FIGURE 19B ...